Trivia: Once Upon a Forest
- Hey, It's That Voice!: A sizable percentage of the film's fans are The Phantom of the Opera fangirls who only watched the movie because Michael Crawford voices Cornelius.
- Also Ben Vereen as Phineas, the bird pastor.
- It's completely unrecognizable because she was about 10 years old when she did it, but Michelle is Elisabeth Moss, otherwise known as Peggy Olsen.
- Bosworth was Vince.
- Charlie Adler played Waggs the squirrel.
- What Could Have Been: Glenn Close originally had a role, but her scenes among others (totaling over 10 minutes) were cut for time.
- Working Title: The Endangered. It was changed into something Lighter and Softer.